For each of the following indicate if the designated technology is appropriate for the indicated water-quality problem. Explain why or why not (answer in no more than a few sentences). a. A 60-micron household filter for cryptosporidium. b. Ion exchange for waste contaminated by radioactive cesium and strontium. c. A strong-base ion exchange resin for nitrate. d. Slow sand filtration for highly turbid water. e. Activated carbon for groundwater contaminated by BTEX (benzene, toluene, ethylbenzene, and xylene) from a gasoline spill. f. Filtration for taste and odour. g. Lime treatment for hardness of 90 mg/L as CaCO3. h. Ion exchange for hardness of 90 mg/L as CaCO3. i. Lime treatment for iron. j. Suspended sediment removal in a vigorously mixed fully-mixed tank.
For each of the following indicate if the designated technology is appropriate for
the indicated water-quality problem. Explain why or why not (answer in no more
than a few sentences).
a. A 60-micron household filter for cryptosporidium.
b. Ion exchange for waste contaminated by radioactive cesium and strontium.
c. A strong-base ion exchange resin for nitrate.
d. Slow sand filtration for highly turbid water.
e. Activated carbon for groundwater contaminated by BTEX (benzene, toluene,
ethylbenzene, and xylene) from a gasoline spill.
f. Filtration for taste and odour.
g. Lime treatment for hardness of 90 mg/L as CaCO3.
h. Ion exchange for hardness of 90 mg/L as CaCO3.
i. Lime treatment for iron.
j. Suspended sediment removal in a vigorously mixed fully-mixed tank.
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